Rotary valve.



J. SHAW.

ROTARY VALVE.

APPLICATION FILED 11.7, 1910. RENEWED FEB. 9, 1912. 1,066,762.

Patented July 8, 1913.

2 SHEETS-SHEET 1.

J. SHAW.

ROTARY VALVE.

APPLICATION FILED 11.7, 1910. RENEWED FEB. 9, 1012.

1,066,762. Patented July 8, 1913.

2 SHEETS-SHEET 2. 5 9 5 10, which shaft is connec UNITED STATES PATENT OFFICE.

JAMES SHAW, OF ATCHISON, CALIFORNIA.

ROTARY Application filed April 7, 1910, Serial No. 554,048.

Specification of V ALVE.

Letters Patent.

T 0 all whom it may concern Be it known that I, JAMES SHAW, citizen of the United States, residing at Atcliison, California, have invented certain new and useful Improvements in Rotar Valves, of which the folk. ving is a specification.

My invention relates to as engines, and particularly to valve mec anism therefor for the control of the inlet and exhaust.

In carrying out my invention I aim to provide a valve mechanism which may be positive in its operation,-and in which the valve will be moved-quickly to its different positions for controlling the ports.

The invention consists in the features of construction and combination and arrangement of parts hereinafter described and particularly set forth in the appended claim.

In the accompanying drawin Figure 1 is a central vertical sectional view through a gas .engine embodyin my invention; Fig. 2 is a part elevation an partsectional View, said view being of a diagrammatic form; Fig. 3 is a view of the intermediate mecha; nism for controlling the valve; Figs. 4 and 5 are respectively a side view and a Seetional view of a sleeve employed in connection with the valve; Fig. 6 is a sectional view of the valve; Figs. 7, 8 and 9 are views in the nature of diagrams showing the cylin der and difierent views of the valve. in different positions, -7 showing the inlet portion of the valveand Figs..8 and 9 the exhaust portion.

In these, drawings, the cylinder 1, the crank shaft 2, the piston 3 and pistonrod 4 are ofany ordinary form. The valve for controlling the inlet and exhaust gases is in the'form of a tapered lug 5 connected with means for rotating t e same consisting of the toothed wheel 6 and the pin wheel 7, the first mentioned wheel being directly on the axle or shaft of the valve, and the last mentioned wheel being ona shaft 8 connected by geerin 9 with a shaft through gearing at 11 with an extension of the crank shaft 12. g I do not limit myself to the or rangement of these shafts and gears shown in their, relation to the cylinder, the view, Fig. 2, being in the nature of a diagram. The valve 5 rotates within a sleeve 6 held in the frame ,of the engine, nuts 13 and 14 on the threaded portions of the rotary valve being employed to hold the arts in roper" posite points is perforated with elongated exhaust ports 15 and inlet orts 16,.there being one of theseat each sice of the sleeve diametrically in line with each other, and these ports are also in line with each other longitudinally. The orts 15 and 16 aline respectively with theinlet' and exhaust ports of the valve casing. Thevalve 5 for controlling the inlet and exhaust gases is provided with two sets of ports, one set being the inlet ports 17 shownin dotted lines in Fig. 1, and in full lines in Fig. 7, and the in full lines in Fig. l and also in Figs$8 and 9. These two sets of ports are disposed'a't different points alon the length of the valve, and each is o four-way character. The angular relation of the two sets of ports is indicated in Figs. 1 and 3, from which it will be seen that the exhaust ports are-displaced circumferentially .of the valve one step in relation to the inlet poi'ts,.and by one step is meant the are through which the toothed wheel 6 turns at each complete revolution of the member 7 or half revolution of the shaft 2.. It will'be observed from Fig. 3 that the exhaust port is axially in line with one of the spaces or notches between the teeth of the wheel; the adjacentinlet port is axially in line with the next' notch in said wheel. Then there is a blank space or .imperforate space or portion of the valve axially in line with two of the notches of the wheel, the next exhaust port being in line with the next notch, and so on throughout the whole circumference of the valve. The gearing at 11. is of two-toone character, and at each half revolution of the shaft 12 the rotary valve will be turnedone step.

In the position of the 1, the exhaust has the exhaust ports and the inlet port is now opposite the imperforate wall of the valve sleeve,.whereupon, as the outward stroke of the piston begins, the valve ,will berotated one step, to throw the exhaust port opposite the imperforate part of the sleeve, and the inlet port in the valve will be made to register with the inlet port through the sleeve, to allow the charge of fresh mixture to enter the cylinder, as shown in Fig. 7. When this 'ehaFging action has been accomplished and the piston begins to return, the valve will parts shown in Fig. just taken place through relation. The sleeve at its diametrica 1y opbe given another forward step movement to other set 18 being the exhaust *ports shown of the valve and 'sleeve,

throw the inlet valve opposite the imperforate wall ofthe sleeve, and to resent the blank or imperforate surface 0 the valve opposite the inlet ort and at the same time, as will be noticed in'Fi'g. 8, the exhaust ports in the valve are out of line with the exhaust ports inthe sleeve. Compression. will now take place, the charge will be fired, and the valve will be given another forward step movement, but this will not be sufiicient to carry the imperforate or blank surface of the valve ast the. port in the sleeve, and, consequent y, the valve will remain closed. As the piston com letes its working outward stroke, and the ex aust is to take place, the valve is given another forward step movement, bringing its exhaustopposite 'the exhaust port-in the sleeve, and bringing the inlet port in the valve in position ,to'regiister with the inlet port in the sleeve at the next action, so that after the piston com letes its exhaust stroke and empties the cy inder of the foul mixture, the nextstep of the valve will brin the inlet port into register for the intro uction of a fresh charge, and this cycle is then repeated. It will be seen that with my invention the valve is quickly moved from one position to anothermstead of, as in ordinary practice, by a-cam which effects a gradual 0 ening and closi of the valve, and it will observed also t at the valv when operated, will be quickly and accu tely arrested by the engagement of the pin and socket wheels, and thus a posi- I tive action of the valve will be secured. The

, tendin valve sleeve-is v provided with one or more channels, one of which is shown at 19, ex-

loniiltudinally of the outer side thereo to w able manner, as b an oil en 20, and this oil will then be directed to the valve rthr u h the ports or openings 21, a series of wlii is formed at the bottom of the channel 19.

I claim as my invention In a rotary valve fora rpmbustion en gine, a valve casing carried by the engine, a tapering sleeve held in said valve casing, a solid conical plug valve rotatably fitting within said sleeve, and ha, two sets of orts, one for the exhaust an one for the ch oil may be fed in any suite exterior of inlet, each of said sets of ports compi'ising Y two -passages extending substantia y at ri ht angles to each other, and fromside to si e of the valve, one set of said ports being displaced circumferentially in relation to the orts of the other set, ahned inlet and alined exhaust ports in the said sleeve and valve casing coacting with the inlet and exhaust ports of the valve, means provided in said sleeve for feedin oil longitudinally'of the valve and means or giving the valve a ste by step forward rotation, substantially as liescribea.

In testimon whereof, I afiix my signature in presence 0 two witnesses.

JAMES SHAW. Witnesses: Flinn C. SCHRAM,

Gno. E. SCREAM. 

